HARTFORD, Conn. -

The U.S. Navy says an officer in charge of a Kings Bay submarine's nuclear plant was temporarily relieved of duty in May after the commanding officer became aware of a potential problem with training exams.

A spokesman for a submarine group based in Georgia says the crew of the USS Rhode Island conducted an investigation during a deployment and concluded the training program had not been compromised. The engineer was reinstated without disciplinary action.

The spokesman said Friday he could not provide details on what prompted the engineer's removal.

The Navy on Friday denied a Freedom of Information Act request by The Associated Press for the investigation documents, citing an exemption for information concerning national defense.

The ballistic missile submarine is based at Georgia's Kings Bay Naval Submarine Base.